Abstracts Book - IMRC 2018

• SWMC-O024 Invited Talk
SPECIATION ANALYSIS OF METAL-CONTAINING NANOPARTICLES
IN ENVIRONMENTAL SAMPLES
Jingfu Liu 1
1 Research Center for Eco-Environmental Sciences of CAS, State Key Laboratory of Environment
Chemistry and Ecotoxicology, China.
Due to their excellent physicochemical properties, metal-containing
nanoparticles (MNPs) are widely used in various areas, and are inevitably
released into the environments. It is highly desired to understand their
environmental behaviors and toxic effects, which strongly relies on the
speciation analysis of MNPs. We have developed a series of extraction methods,
including cloud point extraction (CPE), disc-based solid phase extraction (SPE),
and magnetic SPE, to selectively separate and preconcentrate the trace MNPs,
composed of metal (Au, Ag), metal oxide (TiO2, Fe3O4), and metal sulfide (Ag2S).
As the composition, surface charge, and sizes of MNPs have remarkable impacts
on their environmental and biological effects, we have developed various
sensitive methods for determining these parameters of MNPs in complex
matrices. The coupling of size-based separation techniques, including field-flow
fraction (FFF) and size-exclusion chromatography (SEC), with element-specific
detectors like inductively coupled plasma mass spectrometry (ICP-MS) enables
not only separate different sized MNPs their corresponding ions, but also obtain
the size distribution of NPs. In our recent work, hollow fiber flow field-flow
fractionation (HF5) and minicolumn concentration were online coupled with
multiple detectors for full spectrum separation, characterization, and
quantification of various Ag(I) species and different sized AgNPs (